Vanadium Diselenide Powder


1 g

Order Code: M2154C1
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Product Code Quantity Price
M2154C1 1 g £268.5

General Information

CAS number ‎‎‎12299-51-3 
Chemical formula VSe2
Molecular weight 208.86 g/mol
Bandgap ~ 1.4 eV (indirect)
Synonyms Vanadium selenide, Bis(selanylidene)vanadium
Classification / Family Transition metal dichalcogenides (TMDCs), 2D Semiconductor Materials, Charge Density Wave (CDW), Hydrogen Revolution Reactions (HER), Nano-electronics, Nano-photonics, Photovoltaic, Materials science

Product Details

Form Powder
Preparation Synthetic - chemical vapour transport (CVT)
Purity ≥ 99.995%
Structure ‎Octahedral (1T)
Electronic properties CDW Metal
Melting point n/a
Appearance Dark powder

General Description

Vanadium diselenide (VSe2) is a typical TMDC material. With a sandwiched layer structure, its layers are bound by weak van de Waals forces which allow the isolation of each layer from its bulk crystals (or powder) to reduce the dimensionality - by either mechanical or chemical exfoliation. 

In bulk form VSeis paramagnetic. It commonly condenses in the 1T structure, which is metallic with no optical bandgap. Monolayer VSe2 has magnetic characteristics and a lower work-function at its edge. However, strong room-temperature ferromagnetism was observed in VSe2 monolayers grown on van der Waals substrates (such as graphite). [1]

Application

Vanadium diselenide has great potential as a catalyst or electrode material in electrochemical hydrogen evolution reaction (HER), supercapacitors, photocatalytic and photoelectrochemical reactions, and lithium-ion and sodium-ion batteries.

Synthesis

Vanadium diselenide powder is obtained via the CVT method, with a purity in excess of 99.995% achieved.

Usage

Vanadium diselenide powder is suitable for liquid chemical exfoliation to prepare VSe2 nanosheets and nanoparticles down to few-layer films. 2D VSe2 nanosheets (NSs) can be successfully produced via an ultrasonication-assisted lithium intercalation process using lithium carbonate in a colloidal solution of NPs. VSe2 powder is also used for the preparation of mono-layer and few-layer films via chemical vapour deposition (CVD).

Literature and Reviews

    1. Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates, M. Bonilla et al., Nat.Nanotech., 13, 289–293 (2018); DIO: 10.1038/s41565-018-0063-9.
    2. Thickness dependence of the chargedensity-wave transition temperature in VSe2, J. Yang et al., Appl. Phys. Lett. 105, 063109 (2014); DIO: 10.1063/1.4893027.
    3. Strain and interlayer coupling tailored magnetic properties and valley splitting in layered ferrovalley 2H-VSe2, S. Feng et al., Appl. Surf. Sci., 458, 191–197 (2018); DIO: 10.1016/j.apsusc.2018.07.070.
    4. Epitaxially grown monolayer VSe2: an air-stable magnetic two-dimensional material with low work function at edges, Z. Liu et al., Sci. Bull., 63, 419–425 (2018); DIO: 10.1016/j.scib.2018.03.008.
    5. Intrinsic valley polarization of magnetic VSe2 monolayers, J. Liu et al., J. Phys.: Condens. Matter, 29, 255501 (2017); DIO: 10.1088/1361-648X/aa6e6e.
    6. Dimensional crossover of the charge density wave transition in thin exfoliated VSe2, A. Pásztor et al., 2D Mater., 4, 041005 (2017); DIO: 10.1088/2053-1583/aa86de.
    7. Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism, C. Yang et al., Adv. Mater., 30, 1800036 (2018); DOI: 10.1002/adma.201800036.
    8. Catalytic Properties of Vanadium Diselenide: A Comprehensive Study on Its Electrocatalytic Performance in Alkaline, Neutral, and Acidic Media, T. Ghobadi et al., ACS Omega, 2, 8319−8329 (2017); DOI: 10.1021/acsomega.7b01226.